Fibre-optic micro-ring-resonator with 2 mm diameter

摘要

The authors report on the manufacturing and measurement of a fibre micro-ring absorption resonator for lambda =1.55 mu m with a biconical reduced fibre diameter down to 8.5 mu m. The small ring diameter of 2 mm exhibits a large free spectral range (FSR) of 30 GHz. From the optical frequency response, a finesse of 4.7 and an insertion loss of 1.2 dB were measured and the power coupling coefficient was calculated to be 0.28. To the authors' knowledge this is the smallest optical ring resonator reported so far.